html,body{/*取消网页外边距*/
    width: 100%;
    height: 100%;
    margin: 0;
}
ul{/*取消小圆点*/
    list-style: none;
}
a{/*取消下划线*/
    text-decoration: none;
    /*鼠标小手*/
    cursor:pointer;
}
table{/*只显示一条边框线*/
    border-collapse: collapse;
}
*{/*取消文字选中*/
    -webkit-user-select: none;
    -moz-user-select: none;
    -o-user-select: none;
    user-select: none;
}
